[opensuse-packaging] RPM changelog aggregator?

Hi, for a certain project(*) I would like to aggregate the changelogs of multiple packages, in chronological order, like for example here: http://download.opensuse.org/factory/repo/non-oss/ChangeLog Where can find a tool to do that? Ideally it should work with installed RPMs, RPMs on disk or whole repos. -- Martin Vidner, YaST developer (*) http://lists.opensuse.org/yast-devel/2009-10/msg00154.html Kuracke oddeleni v restauraci je jako fekalni oddeleni v bazenu